Create docs/guides/board-operator/delegation.md explaining the full
CEO-led delegation lifecycle from the board operator's perspective.
Covers what the board needs to do, what the CEO automates, common
delegation patterns (flat, 3-level, hire-on-demand), and a
troubleshooting section that directly answers the #1 new-user
confusion point: "Do I have to tell the CEO to delegate?"
Also adds a Delegation section to core-concepts.md and wires the
new guide into docs.json navigation after Managing Tasks.
Co-Authored-By: Paperclip <noreply@paperclip.ing>
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